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Spontaneous squamous cell carcinoma of the tongue and multiple bronchioloalveolar carcinomas in a Virginia opossum (Didelphis virginiana).

Abstract
Two primary tumours, squamous cell carcinoma of the tongue and multiple bronchioloalveolar carcinomas, were diagnosed in a Virginia opossum (Didelphis virginiana). Two oral masses were located in the right ventrolateral surface of the tongue, near the frenulum, and the lungs contained multiple, widely distributed, nodular masses. Microscopically, the oral masses were composed of invasive cords of pleomorphic, polyhedral cells, typical of squamous cells. The multiple pulmonary masses consisted of non-ciliated, cuboidal, columnar, or occasionally polyhedral cells arranged in an alveolar pattern with multifocal areas of necrosis. This is the first report of spontaneous oropharyngeal squamous cell carcinoma in the Virginia opossum. However, multiple pulmonary adenomas have been reported previously in this species, the lesions being similar to those in sheep pulmonary adenomatosis (jaagsiekte). In the present study, immunohistochemical examination of the pulmonary tumours with a rabbit polyclonal antiserum to jaagsiekte retroviral capsid protein proved negative.
AuthorsD Y Kim, M A Mitchell, M De las Heras, H W Taylor, D-Y Cho
JournalJournal of comparative pathology (J Comp Pathol) 2002 Feb-Apr Vol. 126 Issue 2-3 Pg. 226-30 ISSN: 0021-9975 [Print] England
PMID11945013 (Publication Type: Case Reports, Journal Article)
CopyrightCopyright Harcourt Publishers Ltd.
Topics
  • Adenocarcinoma, Bronchiolo-Alveolar (pathology, veterinary)
  • Animals
  • Carcinoma, Squamous Cell (pathology, veterinary)
  • Fatal Outcome
  • Female
  • Lung Neoplasms (pathology, veterinary)
  • Neoplasms, Multiple Primary (pathology, veterinary)
  • Opossums
  • Pulmonary Alveoli (pathology)
  • Tongue Neoplasms (pathology, veterinary)

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